They say milk is good, or Wet wipe, then use a wax and buff it up. You could off course use Saddle soap.............or try Car leather upholstery cleaner!
Patty: I love this product!
I wrote a post about this that might help you - https://chascrazycreations.com/how-to-deep-clean-your-leather-couch/
Saddle soap is my go to for leather items.
Get leather cleaner from the Auto Parts store. It is made for leather car seats.
Use a cleaner meant for leather.
Patty: I swear by this stuff!!!